Heat control



May 1l, 19435 'w. c. MCANLIS HEAT CONTROL Filedrm.l 12, 1941 Patented May 11, 1943 UNITED STTES yPATENT OFFICE 2,318,875 naar cou'raor.

Wallace C. McAnlis, Detroit, Mich.

Application November 12, 1941, Serial No. 418,680

4 Claims.

This invention relates to a new and useful improvement in heat control means.

An object of this invention is to prevent the excessive heating oi a room and to prevent the waste of heat which is ordinarily occasioned by the occupant opening a window.

A further object of the invention is to control the temperature of a room within close limits. such limits being such as may be desired.

Another object of the invention is to reduce the lapse of time between operation of the heat controls and the change of temperature effected thereby.

Still another object of the invention is to elimina hunting" of the controls or in other words the heat is not turned on or ofi at short intervals of time by reason of over-sensitivity of the controls. v

A further object of the invention is to permit heat to be maintained within the radiator when it is not needed to warm the room, and when the heat is later required it may be released.

Another object of the invention is to provide a thermostatic control and a control operable upon opening of the window, which controls operate to open and close a damper in a casing about a radiator.

A further object of the invention is to provide electrical connections and devices to actuate the damper.

Other and further objects and advantages of the invention will become apparent from a reading of the following description in which reference is made to the accompanying drawings, of which there is one sheet, and in which:

Fig. 1 is a perspective view of the invention installed in a room;

Fig. 2 is a side elevational view of a radiator with the device installed therein, being partially cut away in section;

Fig. 3 is a fragmentary view of a window with one of the controls which forms a part of this invention installed therein, the view being par- 'tially in section; and

Fig. 4 is a schematic view of the wiring of the invention.

This inventoin is applied to a radiator I8 of conventional type, which, because of the nature of this invention, need have no valve or manual control attached thereto to control the flow of heating fluid therethrough. Because it is not necessary to open and close any valve in the steam or hot water supply lines to the radiator, the functioning of the heating system is improved in that in common controls of radiators opening and closing the valve permits air to enter in the system, which causes air pockets. Air pockets sometimes prevent the return of the heating iiuid to the radiator when the valve is re-opened. cause corrosion of the pipes, cause objectionable noises or hammers and cause discomfort and annoyance te the occupant of the room. The radiator is enclosed in a casing I2, which may be insulated by heat-insulating material i4 so as to retain heat within its walls. An opening i8 is provided at the top of the casing i2, and a damper i8 fits within the opening i6 so that when the'damper i8 is closed no heat may escape from the top ofthe casing I2. Another opening 28 is provided in the bottom of the casing l2 to permit the circulation of air past the radiator lil. A crank 24 is attached to the damper i8 so that rotary movement of the crank 24 causes the damper i8 to open and close. The crank 24 has a pin 28 attached thereto which ts within the slot 28 in the core 32 of the vertically mounted solenoid 34. A spring is attached at one end to the core 32 and at the other to the crank 24.

When the damper i8 is open and electric current flows through the coil 38 of the solenoid 34, the core 32 is attracted and pulled upward. This results in placing tension on the spring 35 and pulls the crank 24 upward, after cushioning the force of the magnetic attraction of the core 82. When the damper i8 is closed and electric current ceases to flow through the coil 26, the force of gravity acts upon the core 22 and it descends.

v'I'he upper end of the slot 28 acts upon the pin 28 and causes rotation of the crank 24 to close the damper I8.

The damper I8 will normally be open so long as there is current owing through the coil 38 and will be closed when there is no current through the coil 36.

A thermostat 38 is installed on one wall o! the room being so designed that the bi-metallic element 40 will expand when the temperature rises, and when it rises above a predetermined temperature will break the connection with the contact 42 so that current will cease to ow from the lines 43 through the coil 38. Thereupon the core 82 will fall by gravity and the damper i8 will be closed. Thereafter no heat will be released from the radiator i0 into the room even though heating fluid such as steam continues to flow through the radiator i0. When the temperature drops so that the element 48 engages the contact 42, current flows through the coil 3l, the core 22 is attracted and raised and the damper I8 restored to open position unless control 44 has. broken the circuit as will be described.

Another control 44 is provided on the window frame 46 in series with the thermostat 88 operable so that when the sash 48 is moved to open position the circuit through the coil 8l will be broken and thereby the damper I8 closed. This prevents wastage of heat through an open window, which would otherwise occur if the thermostat 38 were not immediately adjusted'to a lower temperature. It will be apparent that this invention iinds particular adaptation in hotel rooms and other places where economy is not of primary concern to the occupant.

The control 44 comprises -a casing 58 which is attached to the window frame". A wire 82 of the circuit above discussed is attached to one insulated binding post I4 and a second wire 56 is attached to a second insulated binding post 58. An electrical contact I8 is ilxed to the second binding post 58, and an electrical contact 62 is attached to a leaf spring 84 which is attached to the ilrst binding post 54. An abutment 66 is likewise attached to the spring 84. The abutment 68 projects out from the casing 50 into the path of the sash 48 so that when the sash 48 is open beyond a predetermined distance the abutment 66 is depressed, breaking contact between the contacts 80 and 82 thereby breaking the circuit. When the sash is shut, the spring 64 causes contact between contacts 60 and 62 and the abutment 68 is forced into the path of the sash 48. However, so long as the window is open more than a predetermined distance, the circuit is broken.

It will be observed that whenever the temperature of the room is above a predetermined amount, the thermostat I8 operates to break the circuit and thereupon the damper I8 is closed, and whenever the sash 48 is opened more than a predetermined distance the control 44 likewise breaks the circuit and the damper I8 is closed. Whenthe sash 48 is open less than the predetermined distance and the temperature is below the predetermined amount, the circuit is closed and the damper I8 is open.

'I'he control 44 may be made adjustable by.-

providing slots 68 in the casing 80 through which screws I0 project into the window frame 48. As will be observed, the casing may be slid up and down within the limits of the slots 88. i

Thereafter the screws 'I0 may be tightened to hold the control 44 in ilxed position. This adjustability is provided so that the distance which the sash 4l may be opened before the control 44 operates to close the-dampers I8 and 22 may be varied as desired (or if installed in a hotel, may be adjusted by the management).

Whereas, I have speciiically pointed out, illustrated and described my invention, nevertheless, it will be understood that certain modifications may be made therein without departing from the spirit oi the invention as set forth in the appended claims. 4

What I claim is:

l. In a heat control, a source of heat, a casing about said source of heat, a damper in said casing, a solenoid coil, a core in said solenoid coll connected to said damper to open said damper, control means breaking the circuit through said solenoid coil upon opening of a window beyond a' predetermined amount, and thermostatic control means breaking the circuit through said solenoid coil upon room temperature exceeding a predetermined amount.

2. In a heat control, a source of heat, a casing about said source of heat, a damper in said casing gravity biased to closed position and operated by electrical means to open position, a resilient abutment extending into the path of a window sash to break the electrical contact in said electrical means upon opening of the window sash beyond a predetermined amount, permitting gravity to close said damper upon opening of the window sash beyond the predetermined amount.

3. In a heat control, a source of heat, a casing about said source of heat, heat-insulating material lining said casing, a damper in said casing gravity biased to closed position and operated by electrical means to open position, control means non-operable upon opening of a window beyond a predetermined amount to interrupt the electrical means and permit gravity to close said damper, and thermostatic control means to interrupt the electrical means to close said damper upon room temperature exceeding a predetermined amount.

4. In a heat control, a source of heat, a casing about said source of heat, a damper in said casing gravity-biased to a closed position and operated by electrical means to open position, a resilient abutment extending into the path oi a window sash operable to break an electrical contact in said electrical means upon opening of the window sash beyond a predetermined amount to close said damper and to make an electric contact in said electrical means upon closing of the window sash and thermostatic means to control said electrical means when said electrical contact is closed to open and close said damper dependent upon the room temperature being above and below a predetermined temperature degree.

WALLACE C. MCANLIS. 

